Magnetic separator.



Patented Aprl No. 698,3n.

.1. H. A. MCPHEE.

MAGNETIC SEPABATUR.

(Application led Dec. 3, 1901.)

(No Model.)

UNITED STATES ATENT OFFICE.

JOHN HUGH ALEX. MCPHEE, OF DUNEDIN, NEW ZEALAND.

MAGNETIC sEPARAToR.

SPECIFICATION formingpart of Letters Patent No. 698,311, dated April 22, 19,02.

Application Jrilednl)ecemlxver 3, 1901. Serial No. 84,558. (No model.)

To @ZZ whom. it 4mag/ c0120@,W1/: K, Y f

Be it known that LJOHN HUGH ALEXANDER MCPHEE, (B. A.",)teacher, a subject ofthe King of GreatBritaimresiding at 49 Moray. Place,vin the city of Dunedin, in the British Colony of New Zealand, have invented a certain Vnew and useful-Improvement-in Magnetic Separatore, of which-the following is a specification. Y

The object of v thisinvention is to provide efficient means for separating out of gold and wash the heavy particles of'iron-sand-in a cheap and rapid manner by an appliance that will also separate magnetic from non-magnetic materials. For this purpose a pulley is magnetized by an electric current, preferably by using thel bosses 'as cores and winding these with insulated electricwire capable ofconducting a currentof`.electricity, soas to`V convert the rim of thesaid pulley intoanl electromagnet. Y, The rim is usuallydivided@ and the portions of same are i-nsulated,the whole ofthe sections being magnetized. `vThe wash, mixed With the magnetic-sand or otherV magnetic material, is passedover thepulley in a thin stream,` preferably by being placed on a belt which works to another pulley, from which usually the power comes from the inotor used and which is preferably run at a quicker speed than the advancing stream of` wash. As the mixed material passes the pulley the material affected by the magnetism is retained, While the rest falls off by gravitation, assisted by thecentrifugal force of the revolving pulley, into one compartment,while the material affected by the magnetism is c arl ried fartherand finally deposited in another compartment bylthebelt on leaving the pul'-, ley, tearing it out of 'thesphere of the mag; netisin. .This separationfcang-be helpedbyj there `being a currentor'jet of water oi''of air playing or blowing on the mixed material at about the point of separation. In any case the magnetic and non-magnetic portions of the mixed material orwash treated fall into different places, each to be treatedas desired.

' Referring to the accompanying drawings, Figure 1 is-a section-of a pulley that can be magnetized according to my invention, andv Fig. 2'is a longitudinal section of the same with the belt omitted. Fig.' 3 isan end secv*tate an even thin stream of material. "devices as shown in a cam K or a'beater or tion of the pulley, showing a slight modica` section of the same.v Fig.:5 is an elevation of a'slight modiiication ,of the insulating and ,',with an end motion given to the pulley.

A is the shaft, and B B the bosses of the pulley, on which the insulated electric` Wires are wound, filling -lthe Aspaces between the bosses B and the rims B', or nearly so.

C is the electric wire; from the electric generator, and it may be noted that as the current is continuous it will lnot interfere with other electric arrangements that may be in the same circuit.

C is a usual ring-brush or othertusual electric connection.

Dis the return-wire and connections.

1 E E are insulating-strips dividing the rims into the desired number of portions.

' EF are chutes for feeding the mixed material tothe belt and pulley in a thin stream, and the"`chute maybe shaken or beaten either up and down, as shown, or sidewise to facili- Such shaker H, driven by a rod J, may be used for Vthis purpose.

The mixed material coming through the chute `F"pours on the belt G any required distance from or close to the Vrim ofthe pulley B', when the portion unaiected by the magnetism falls off into the bin .L and the portion affected by the magnetism .is carried to the bin L','only falling off when the belt G is leaving the pulley in theusual course when the magnetic material is torn away from the mag netic induencelby the belt. I is a water or, air jet location.

.1--IAs. ,mentioned, a-currentotV air or Water playingon the belt when on the pulley or If, as well as the chute, thepulley-isw-annted to be shaken, such side motion can be given to it by such means as the cam and face-plate shown in Fig. 5, where M is a concentric face'- IOO plate and Nan adjustable eccentric one Working up to the Wheel O and kept to it by such means as the collar and adjustable spring P. Grooves of different shapes are shown, which would have a corresponding` face at N. The pulleys could also be polygonal instead of round for this same shaking motion.

The pulleys may be either flanged or plain, and the ianges may be of non-magnetic material, il desired.

I have tried Winding the arms of pulleys, using them instead of the bosses for the cores, and also an automatic arrangement of demagnetizing and remagnetiziug pulleys Where the insulation was across the rim at about right angles to the insulation of the rims shown; but I believe the method of winding the bosses of the pulleys as herein set forth to be the simplest and most eiiiective Way 'for practical Working of my invention.

In this invention any suitable sizes or materials or strength of the electric current may be adopted.

Having now described my in ventiou, what I claim, and desire to obtain by a patent of the United States of America, is-

A magnetic separator, a pulley consisting of a core and a shell surrounding the same and integral therewith,a magnetic coil Wound upon said core and extending substantially to the inner face of said shell, a shaft extending through said core for supporting and rotating the pulley, suitable electrical connections for said coil, insulated means for dividing the pulley in sections, a belt operated by said pulley and adapted to receive and separate the material, means for supplying the material to the belt, and means for operating said pulley in a rotary direction and to impart a transverse movement to the pulley While it is rotating.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

J N 0. HUGH ALEX. MCPHEE.

\Viti1esses:

BENTON MACAULAY DAvEY, ELIZABETH ANN DAVEY. 

